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Ink cartridge for inkjet printerInk cartridge for inkjet printer description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060232649, Ink cartridge for inkjet printer. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of Invention [0002] The present invention relates to a simple and effective ink cartridge for an inkjet printer for stably supplying ink. [0003] 2. Description of Related Art [0004] Currently, commercially available ink cartridges can be divided into two types in the following. [0005] A. A porous material is used to store ink and fiber bundles are used to obstruct leakage and smoothly supply ink, which is the patent right issued to CANON. [0006] B. The fluency in supplying ink is controlled by a non-return valve or a pressure-control mechanism and fiber bundles. [0007] However, the above two types (A and B) of ink cartridges have the following disadvantages. [0008] 1. The porous material and the fiber bundles occupy relative large space of the ink-storage chamber, resulting in a decrease in the printing yield and an increase in the manufacturing cost. [0009] 2. A certain amount of ink is remained in the porous material and the fiber bundles, thus causing a waste and doing harm to the environment. [0010] 3. The pressure of this type of ink cartridge is low and it is hard to control this ink cartridge, and thus it is not suitable for mass production and it is difficult to control the quality and the yields is relatively low. SUMMARY OF THE INVENTION [0011] An objective of the present invention is to provide a practicable and highly effective ink cartridge for an inkjet printer. Under the control of the elongated fiber bundles and labyrinth capillary grooves, the ink cartridge can reliably and stably supply ink, thus controlling the whole printing process. [0012] The ink cartridge for an inkjet printer in the present invention comprises a top cover, a bottom wall, a handle, an ink chamber, an air inlet, and an ink supply port. The air inlet is disposed at the top of the ink chamber whereby the ink chamber is communicated with the atmosphere. A labyrinth capillary is disposed at a side surface of the bottom wall, with one end in communication with the bottom of the ink chamber and the other end in communication with the middle portion of the cavity for accommodating elongated fiber bundles. The ink supply port is disposed at the bottom of the cavity for accommodating elongated fiber bundles, and the elongated fiber bundles are accommodated within the cavity. The elongated fiber bundles are disposed in the cavity for accommodating elongated fiber bundles from top to bottom, and extend to the ink supply port, so as to firmly contact the inner wall of the cavity for accommodating elongated fiber bundles. The communication hole communicating the labyrinth capillary and the cavity for accommodating elongated fiber bundles does not directly contact the elongated fiber bundles, and an interval exists therebetween. The handle is a separated workpiece made of an elastic material, and the handle in an inverted-hook shape is disposed at the top portion of the bottom wall from top to bottom. An air inlet labyrinth groove and an ink leak-proof device are disposed on the top cover, and an ink inject hole is disposed at the top cover on top of the cavity for accommodating elongated fiber bundles. The labyrinth capillary is formed by soldering a sealing film on the labyrinth capillary groove at a side surface of the bottom wall. [0013] Before installing the ink cartridge, the air inlet labyrinth is opened, such that the air enters the ink chamber of the ink cartridge from the air inlet labyrinth via the ink leak proof mechanism, thereby keeping the ink chamber at a normal atmosphere pressure. After installing the ink cartridge, elongated fiber bundles are firmly pressed against the ink inlet of the print-head, and meanwhile the ink supply port of the ink cartridge and the print-head are sealed. In order to prevent ink leaking in use caused by the change of the environmental temperature, one end of the labyrinth capillary is communicated with the bottom of the ink chamber, and the other end is communicated with the middle portion of the cavity for accommodating elongated fiber bundles. Thus, the elongated fiber bundles can steadily supply ink to the print-head when the ink cartridge starts printing. At this time, the negative pressure in the cavity for accommodating elongated fiber bundles rises, and under the slight pressure, the ink within the ink chamber flows to the elongated fiber bundles along the labyrinth capillary for compensating ink, thereby maintaining the ink contained by the elongated fiber bundles in a relatively stable proportion, and the air enters the ink chamber along the air-inlet labyrinth. [0014] The present invention has the following advantages of: [0015] 1. greatly reducing the residual ink, improving the printing yield, and reducing the manufacturing cost; [0016] 2. reducing the waste, thereby benefiting for environment protection; and [0017] 3. accomplishing the mass production, thereby enhancing the qualification rate. [0018] In order to make the aforementioned and other objectives, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS [0019] FIG. 1 is a schematic sectional view of a structure of the present invention. [0020] FIG. 2 is a schematic top view of the structure in FIG. 1. [0021] FIG. 3A is a schematic view when the ink cartridge has been completely mounted in the print-head bracket. Continue reading about Ink cartridge for inkjet printer... Full patent description for Ink cartridge for inkjet printer Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Ink cartridge for inkjet printer patent application. ###
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